Method for narrowing fiber strips in manufacturing rovings from paper pulp and similar fibrous material



Mar. 13, 1923. 1,448,280

F. P. PRIEM METHOD FOR 'NARROWING FIBER STRIPS IN MANUFACTUR ROVINGS FROM PAPER -PULP AND' SIMI FIBROUS MATE L Filed July 1919 Patented Mar. 13, 192 3.

ui'rs FRIEDRICH PAUL PRIEM, or HEi'nnNHnIM-oivgfirs-Beam, GERMANY, nssreivon, BY

DELAWARE.

METHOD FOR NARROWING FIBER STRIPS IN MANUFACTURING ROVINGS FROM PA PER- PULP AND SIMILAR FIBROUS MATERIAL.

Application filed July 7, 1919. Serial No. 309,149.

To all whom it may concern:

Be it known that I, FRIEDRICH. PAUL PRIEM, citizen subject of Heidenheim, residing at Heidenheimon-the-Brenz, Germany, have invented certain new and useful Improvement in Methods for Narrowing Fiber Strips in Manufacturing Rovings from Paper Pulp and Similar Fibrous Material, for which I have filed applications in Germany, Mar. 1 1, 1918; Denmark, Nov. 5. 1918; Finland, May 29, 1918; Austria, Nov. 2, 1918; Holland, Nov. 9, 1918; Hungary, Nov. 5, 1918; Sweden, Oct. 28, 1918; Norway, Nov. 16, 1918; Switzerland, Oct. 26, 1918; Belgium, Dec. 2, 1918; Luxembourg, Oct. 30, 1918, and of which the following 15 a specification.

In the manufacture of rovings from paper pulp or similar fibrous material narrow strips are produced on a paper web or paper cylinder machine, which strips were rounded or narrowed by a special rubbing apparatus. The latter consists of two india rubber end less belts or two rubber mantles placed on rolls and operated so as to be subjected to a lateral to and fro motion, thereby rounding the strips carried between them. Rubber, however, is an article, which is costly and frequently diflicult to obtain. A suitable surro ate for rubber has not yet been found. (%n the other hand for preparing paper pulp strips for spinning or even for reeling to spools it is of importance that the strips be narrowed or rounded. Aocording to the present invention the here tofore known rubbing machines are replaced by folding devices, through which the strips produced in the paper machines are led so as to be folded longitudinally. The folding apparatus may either be so constructed that thestrips are folded once or twice or are folded into a tubular shape.

The invention, therefore, has for its main object a method for narrowing or rounding strips such as are produced in the manufacture of rovings from paper pulp or similar material. The method consists therein that the strips coming from the strip producing machine are folded longitudinally while still in a wet state and thereuponreeled up in any convenient manner to form spools or the like. I

In the drawing an apparatus is shown I lines A-A, B-B, 0- 0, D-D, E-E, F- i F, G-G of Fig. 3.

Fig. 5 is an elevation of part of the ma chine in a'modified construction.

In the construction shown by way of example four folding devices are used for narrowing the strips in longitudinal direction. The strips produced by the machine are led to the folding'apparatus c, 0 c 0* and the narrowed strips are then led to the I reeling devices h 70*, k Zafiin known manner. In the construction shown the paper strips are led through the folding devices by an endless band d. The folding funnel c is about the double breadth at its upper end of the belt cl, that is to say it has about the breadth of the strip. At the lower or delivery end the folding funnel has the breadth of the strip when folded, thus in the con-, struction shown when doubled up. The manner in which the strip is folded, will be clearly understood by examining the Figs. 3 and 4 to 4 It may here be said that it is not necessary to make use of the large deli-very or distributing roller 6, since it is also possible to lead the strips away to the folding apparatus from the guiding roll Fig. 5.-

The. folding apparatus may be combined with the reeling device. Such a combination is shown by way of examplein Fig. 5, in which the endless belt at its lower end, whereit passes the lower roller e carries the spool g guided in any suitable manner.

I claim:

1. Method, for narrowing or rounding fiber strips in manufacturing rovings from paper pulp or similar fibrous material consisting therein that the strips coming from damp fiber strips through a folding device the strip producing machine are folded lonin such manner that they are longitudinally 10 gitudinally While still in a Wet state and folded in a straight line.

thereupon reeled up in any convenient manner to form spools and the like.

2. A method of manufacturing rovings from paper pulp comprising in forming narrow paper pulp strips and leading the FRIEDRICH PAUL PRIEM.

Witnesses WENDELIN LINK, PAUL REIOH. 

